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1) Photolysis of N-ethoxycarbonyliminopyrazinium ylides: formation of pyrazoles
Takashi Tsuchiya, Jyoji Kurita and Koichi Ogawa, J. Chem. Soc., Chem. Commun., 1976, 250

DOI:

http://dx.doi.org/10.1039/C39760000250

2) Mechanism of the formation of semiquinone radicals by ultra-violet irradiation of six-membered aromatic aza-compounds in neutral methanol, and of radical cations by ultra-violet irradiation of six-membered aromatic diaza-compounds in methanol acidified with hydrochloric acid
Azélio Castellano, Jean–Pierre Catteau and Alain Lablache–Combier, J. Chem. Soc., Chem. Commun., 1972, 1207

DOI:

http://dx.doi.org/10.1039/C39720001207

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